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NEW QUESTION # 220
On FlashArray models that use standard DFMs instead of DFMDs, which NVRAM bays are always populated?
Answer: B
Explanation:
This question addresses the distinction between the newer "Distributed NVRAM" architecture (DFMDs) and the "Dedicated NVRAM" architecture (using separate NVRAM modules in NVB slots).
If a FlashArray model is using standard DFMs (DirectFlash Modules that contain only flash storage and no onboard NVRAM), the system must rely on dedicated NVRAM modules installed in the chassis to handle the write cache. As established in the hardware architecture for these generations (such as the //X R2/R3), the base requirement for system quorum and redundancy is a mirrored pair of NVRAM cards.
These cards are always populated in NVB0 and NVB1. This ensures that even the smallest supported configuration has a redundant write buffer.
NVB0 and NVB1 are the primary slots wired for this purpose on the midplane.
Populating non-contiguous slots like NVB0 and NVB3 or NVB0 and NVB2 would be an invalid configuration, likely preventing the array from booting or properly mirroring the write cache data between the modules.
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NEW QUESTION # 221
Which Pure1 app functionality requires that a user is on their internal company network?
Answer: A
Explanation:
The Pure1 mobile app (available on iOS and Android) is a powerful, cloud-connected tool that allows storage administrators and engineers to monitor their fleet from anywhere in the world. Viewing array telemetry (like IOPS, latency, and bandwidth), monitoring capacity utilization, and managing support cases are all handled seamlessly through Pure1's secure cloud infrastructure. These features work perfectly fine over a standard cellular network or public Wi-Fi.
However, enabling a Remote Assist session is treated with a much higher level of security. Remote Assist opens a secure, reverse SSH tunnel directly from the array to Pure Storage Support, allowing them to perform troubleshooting or execute upgrades. To trigger this from the Pure1 mobile app, the command must be authenticated and sent directly to the array's local management IP interface-it does not pass blindly down from the cloud.
Because of this architectural security design, the mobile device must be connected to the internal company network (e.g., via a corporate VPN or internal corporate Wi-Fi network) that has routing access to the array's management subnet. This ensures the organization's existing firewall and security models are respected, preventing unauthorized external triggers of support tunnels.
NEW QUESTION # 222
During an intra-series upgrade from //XR3 to //XR4, which command should the Implementation Engineer run to verify host connectivity before removing the secondary controller?
Answer: D
Explanation:
Executing an intra-series Hardware Non-Disruptive Upgrade (HWNDU) from a FlashArray//XR3 to an //XR4 is a highly orchestrated procedure. It involves failing over active I/O responsibilities, physically removing legacy controller nodes, and seamlessly introducing newer generation hardware without causing any downtime for the connected hosts.
Before an Implementation Engineer physically unplugs or removes a secondary controller-or initiates a failover to take the primary controller offline-it is an absolute prerequisite to verify that the frontend host multi-pathing is healthy. If a host is accidentally single-pathed to the controller that is about to be removed, an all-paths-down (APD) event will occur, causing immediate application disruption.
To safely validate this from the array's perspective, the engineer must execute the iobalance --sampletime 30 command within the Purity CLI. This specialized diagnostic command forces the array to actively sample and monitor the incoming SCSI/NVMe read and write commands across all frontend target ports for a continuous
30-second window. The output produces a detailed matrix showing exactly how traffic is distributed across both controllers and all active host initiators. If the data confirms that I/O is cleanly balanced and redundantly flowing across the surviving controller's paths, the engineer can confidently proceed with the physical removal phase of the HWNDU.
NEW QUESTION # 223
An Implementation Engineer is onsite to replace a 22TB data pack with a new 91TB (10 x 9.1TB) data pack in a FlashArray//X90R5 Gen 2. The array is at 90% capacity. It currently has 22TB (10 x 2.2TB) in slots 0-9 and 63TB (14 x 4.5TB) in slots 10-23, configured as two separate write groups.
What is a supported method to proceed with the planned capacity migration?
Answer: A
Explanation:
When executing a capacity migration or consolidation on a highly utilized Pure Storage FlashArray (such as an //X90 Gen 2 at 90% capacity), physical and logical space limitations dictate the required procedure. The FlashArray chassis only contains 24 front-facing capacity drive bays. In this scenario, the chassis is fully populated with 10 drives in slots 0-9 and 14 drives in slots 10-23.
Because all physical chassis slots are occupied, there is nowhere to physically insert the new 91TB (10 x 9.1 TB) DirectFlash Modules. Furthermore, because the array is at 90% capacity, there is insufficient logical free space remaining to evacuate the 22TB data pack into the existing 63TB pack's free capacity. Standard evacuation requires the system to non-disruptively move data off the target drives before they can be safely removed, which is mathematically impossible here without external capacity.
To resolve this, the officially supported method is to install a temporary "swing shelf" (Option B). A swing shelf acts as a temporary expansion vessel. The Implementation Engineer physically racks the swing shelf, connects it to the array, and inserts the new 91TB data pack into it. Purity can then safely evacuate the data from the old 22TB chassis data pack onto the new drives in the swing shelf. Once the evacuation completes, the old drives are decommissioned and removed, the new 91TB drives are seamlessly relocated into the chassis slots 0-9, and the swing shelf is removed and returned.
NEW QUESTION # 224
Prior to running the puresetup command, which command should an Installation Engineer run on a new install of a FlashArray//XR4 array?
Answer: C
Explanation:
The FlashArray//XR4 introduces a new hardware platform architecture (internally codenamed or associated with "Cobalt" components for its BMC and chassis management). During the manufacturing and initial deployment phase, specific validation scripts are used to ensure the platform hardware is correctly initialized before the Purity Operating Environment takes over.
For a new install of a FlashArray//XR4, the Implementation Engineer is often required to run cobalt check . py (or cobalt_check.py).
This engineering-level Python script queries the Baseboard Management Controller (BMC) and internal sensors to verify that the chassis components, fans, and power delivery systems are reporting "Healthy" status specifically for the R4 architecture.
Running this before puresetup prevents the setup process from failing midway due to a hardware initialization error. It acts as a "pre-flight" hardware validation specific to the R4 generation's new chipset and management subsystem.
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NEW QUESTION # 225
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